Impeller blade assembly



March 4, 1958 J, A, PAGE I 2,825,414

IMPELLER BLADE ASSEMBLY Filed Dec. 28, 1956 2 Sheets- Sheet 1 26 AZ A;

El rl f 1% 28 F/G. 2. i Z

36 ii v INVENTOR.

V JOSE/9,4, 4. 405,

March 4, 1958 J. A. PAGE 2,825,414

- IMPELLER BLADE ASSEMBLY File d Dec. 28, 1956 2 Sheets-Sheet 2 INVENTOR. /OS''. 4. P465,

United States Patent C IMPELLER BLADE ASSEMBLY Joseph A. Page, Portland, 'iaiae Application December 28, 1956, Serial No. 631,180

2 Claims. (Cl. 170179) This invention relates generally to an improved impellet blade assembly for use on a rotating shaft incorporating a woodworking tool or the like on the terminal end thereof, said impeller blade assembly incorporating means for urging air toward the longitudinal axis of a rotary shaft for directing air toward a tool for the purpose of cooling the same, the air also serving to move wood chips'or the like away from a work piece beingworked upon in order that an operator may more readily observe the condition of such a work piece.

A still further object of invention in conformance with that set forth is -to' provide an impeller blade or fan assembly-incorperating -.a support hub including complimentary portions secureable in circumposed relationship about an intermediate portion of a rotary shaft, said support hub having extending from opposite sides thereof means for clampingly engaging oppositely disposed blade elements, said blade elements incorporating means for urging air along the longitudinal axis of rotation of the support hub for the purposes heretofore mentioned.

And yet another object of invention in conformance with that set forth is to provide an impeller or fan blade assembly of the character involved which is readily and economically manufactured, easily installed, and highly practical and serviceable for the purpose intended.

These together with other objects and advantages which will subsequently become apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawing forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is an elevational view of a router utilized for cutting the pockets in the frame of a pool table, for example, said router incorporating on the rotary shaft thereof the impeller blade assembly of the invention;

Figure 2 is a fragmentary horizontal section taken substantially on the plane of line 2-2 of Figure 1;

Figure 3 is a fragmentary enlarged horizontal section of the impeller or fan blade taken substantially on the plane of line 3-3 of Figure 1;

Figure 4 is a perspective view of one of the blade elements of the impeller blade assembly;

Figure 5 is a fragmentary section taken substantially on the plane of line 55 of Figure 3;

Figure 6 is a view similar to Figure 3, showing a single blade element on a support hub, this blade element being of the character which would be rotated in a direction opposite to that of the impeller blade assembly of Figure 3;

Figure 7 is a perspective View, similar to Figure 4, showing the blade element of Figure 6 in detail; and

Figure 8 is a perspective view of the support hub of the impeller blade assembly, one of the complimentary portions being shown by means of solid lines, the others of which being shown by means of dotted lines.

Referring to the drawing in detail, considering Figures 1 and 2, indicated generally at 10 is a router incorporating a suitable support base 12 incorporating a vertical support sleeve 14 suitably braced at 16 and 18, said sleeve incorporating a suitably journalled rotary shaft 20, power driven by means of an endless belt type drive indicated generally at 22, said rotary shaft 20 incorporating on the lower end thereof a suitable router blade 24. Indicated generally at 26 is a vertically adjustable jig assembly for supporting thereon beneath the router blade 24 the frame of a pool table indicated generally at 28 which will have cut in the corners thereof the pockets of the pool table as clearly seen in Figure 2. The jig is vertically adjustable and incorporates a vertically extending transparent shield or guard assembly indicated generally at 30. The aforementioned structure is conventional, and accordingly further description is believed to be unnecessary.

Indicated generally at 32 is an impeller or fan blade assembly. The impeller blade assembly 32 incorporates a support hub indicated generally at 34 and a plurality of radially extending blade elements 36. Although the exemplary embodiment discloses an impeller assembly incorporating four blade elements 36, the impeller blade assembly will also operate utilizing two oppositely or diametrically opposed blade elements 36.

The supporthub 34 incorporates complimentary collar portions 38 including an intermediate arcuate support portion 40 terminating in diverging clamp plates 42. The clamp plates 42 have extending transversely therethrough suitable apertures 44 for receiving therethrough retaining nut and bolt assemblies 46. The complimentary collar portions 38 define the support hub 34 which will be secured in circumposed relationship about an intermediate portion of a rotary shaft 26.

The blade elements 36 incorporate an integral mounting plate 48 including transverse apertures 50 therethrough for alignment with the apertures 44 in the clamp plates 42 of the support hub, the nut and bolt assemblies 46 being utilized to retain the blade elements 36 in fixed relation on the support hub. Depending from the rn-ount ing plate 48 is a top plate member 52 which is in obtuse angular relationship relative to the general plane of the mounting plate 48, see Figure 5, for example, the forward edge of the plate 52 as indicated at 54 constituting the leading edge of the blade elements. The plates 52 have depending therefrom in normal relationship thereto a flange 56. The blade elements 36 incorporate in the plate 52 and flange 56 a transverse intermediate bend portion 58 providing on each blade element a directing or baflle portion 60, these portions 69 on opposite sides of the support hub 34 converging toward each other in intersecting relationship relative to the longitudinal axis of a rotary shaft upon which the impeller blade assembly is mounted i. e. toward the axis of rotation of the impeller blade assembly. The blade elements 36 constitute scoop elements which during rotation with the rotary shaft upon which they are mounted will urge air toward the longitudinal axis of rotation of the impeller blade assembly. Indicated generally at 36' in Figures 6 and 7 are blade elements which will permit rotation in a direction opposite that of the impeller blade assembly shown in Figure 3. The blade elements 36 will be utilized on a support hub 34 similar to that pre viously described.

If desired, the blade elements 36 may be constructed of a semi-rigid material wherein accidental contact of an operator with the blade elements will not seriously injure the operator.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and'accordinglyiall suitable modifications and a "equivalents'may'b'e'resorted to; falling 'Within the scope i 'of the appended claims. 7 t

I LFor use on a rotary shaft' of wood.r-workiiglap or the like; an impeller blade assemblytcom'pris'ing a sup* i f "9,320,4714 r opposed relationship from opposite sides' of the support 'hub and the axis. of rotation of said hub on'thefrotary' port clamp including; complimentary portions gircurnpositionable about an intermediate portion of a rqtary shaft,

seinbly du'rin girotation of the shat'tjthe blade felenients including amounting plate engaged by s'aid 'fiastening me'ans a nd an elongated scoopdepending frona the mounting} plate, said scoop comprising'aitop plat e portionione edgeiof the top plate portion definingthe leading'edge or the'blade elements, said top plateportionextending 'rearwardly from the leading edge in obtuse angular relav tionshi'p' relative tothe mounting plate of'the blade" ele- 'ments, the trailing edge of'th e' blade elements terminating in a depending flange portion substantially normalfto the top plate portion, said blade elements including intermediate angular. inner, end portions converging toward 1 each other frorn opposite sides of the support clarnp,

2. An impeller'blade assembly for use on a'r otlary sh aft assembly. 7

7 comprising 5 hub including compliinentary i portions including fastening means for detachab ly se curingthe same about an interrnediate portion of the rotary shaft, said collar portions'including cooperating 5 juxtaposed'clamp plate portions extending in co-planar shaft, at least' one pair "of, opposed bladeelements Vex-g tending from the clamp plate portionsgbn opposite sides s of the support hub, said bladeelem'entscomprising elon} t gated 'airtscoops, saidjair' scoops incgrporatinga t1'an S-5 tverse angular bend portiontconverging from oppositeg sides' of the support hub for directing rairalongthe axis of 'rotation of the support hub, said air scoops' including a first flange extending angnlarly' awayifr om thelplane of the clamp plate portions defining therleading' edge of the blade elements the first flange' continuingin adepending flange normal theretortprovidinjg a resistance -of nove- 'mentof the blade elements through-the air and urging" axis o frotation "of the impeller air radially toward the References Cited of UNITED, sTATES jPATENTsi 

